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PDF LB11851M Data sheet ( Hoja de datos )
| Número de pieza | LB11851M | |
| Descripción | Monolithic Digital IC | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LB11851M (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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Ordering number : ENA0673A
LB11851M
Monolithic Digital IC
Microprocessor Fan Motor
Interface Driver
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The LB11851M provides an interface between a microcontroller motor control signal and external MOS transistors. This
device can implement a microprocessor fan driver with a minimal number of external components. The LB11851M is
optimal for server and personal computer microprocessor fan drive in response to temperature or other external signals
when high precision and high air flow are required.
Features
• Fan motor interface driver function (FGIN)
⇒ This IC accepts a signal from a microcontroller and interfaces to external power transistors (PMOS and NMOS) to
provide high-efficiency low-power single-phase full-wave drive.
• Variable speed input pin (PWMIN)
⇒ PMOS side PWM control
NMOS side current regeneration using slow decay is used to achieve quite high-speed control.
• Built-in kickback absorption circuit (OUT1P/2P)
⇒ This circuit absorbs the kickback current that is generated at phase switching or power on/off to achieve smooth
current regeneration and protect the external transistors against destruction or degradation.
• Built-in current limiter circuit (SENSE)
⇒ This circuit implements a chopper-type current limiting control that operates at startup and during lock protection
mode.
The current detection voltage is set to a fixed 0.2V internally.
• Built-in microcontroller power supply (5VREG)
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
41807 MS PC 20070417-S00001 / 22107 MS PC 20070122-S00004 No.A0673-1/6
1 page  
LB11851M
Application Circuit Example (12V)
VM=Line
C=1µF
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C=1µF
1P
1N
R1=1kΩ
2P
2N
RF
VDD
C=1µF
VCC
5VREG
SENSE
PWMOUT
H IN-
IN+ FGOUT
Microcontroller
PWMIN
INPUT
A/D
VSS
PWMIN
FGIN
OUT2P
OUT2N
OUT1P
OUT1N
GND
FG
2P
2N
1P
1N
No.A0673-5/6
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet LB11851M.PDF ] | |
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